I admit to being a fan of the diesel/JetA1 engine, and hope that any problems there are can be quickly ironed out...
I am as well - apart from anything it does seem bizarre that manual carb heat is still the usual practice in light aviation.
It would be nice as well for Lycoming/Continental to have some competition, there must be a massive profit margin on their engines with the design costs having been written off before many of us were born!
There seems to be a strange gloating involved when people comment on any problems with the Thierlert engines and the DA40/42, not sure why as it will benefit us all if they are a success.